<?phpclass ExhibitsofExhibitorViewModel extends ViewModel{	 public $viewFields = array(        'exhibition_exhibit'=>array('exhibition_id','exhibit_id',		'user_id'),		'exhibit'=>array('id'=>'exhibit_id','name_cn','name_en',		'level1_name','level2_name','level3_name','is_verified',		'_on'=>'exhibition_exhibit.exhibit_id=exhibit.id'),		'exhibitor'=>array('id'=>'exhibitor_id','name_cn','logo_url',		'type_name','user_id'=>'uid','is_verified',		'_on'=>'exhibition_exhibit.user_id=exhibitor.user_id'),    );}?>